Vulcanized caoutchouc-like substance.



' UNITED STATES PATENT OFFICE.

FRITZ HOFMANN AND CARL COUTELlLE, OF ELBERFELD, GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. BAYER & F ELIBERFELD, GERMANY, A

CORPORATION OF GERMANY.

VULCANIZED CAQUTCI-IOUC-LIKE SUBSTANCE.

No Drawing.

Specification of Letters Patent.

Application filed March 20, 1911.

Patented Jan. 13, 1914.

Serial No. 615,671.

Caoutchouc-Like Substances, of which the show following is a specification.

By our application Ser. No. 578.608 the production of a. new caoutchouc like substance is described, which is obtained by polymerizing erythreno. It has now been found that this caoutchouclike substance can be vulcanized, substances being obtained equal to and some even better than vulcanized natural caoutchouc. These facts could not be foreseen in the existent state of knowledge with regard to the nature and the processes during the vulcanizing of caoutchouc. One could not know if this new caoutchouc-like substancc'too would the same behavior to vu'lcanizing agents as the natural caoutchouc does. Still equal to and some even better than vulcanized product, if it could be obtained at all} would have the same valuable properties of vulcanized caoutchouc.

Example 1: 5 parts of the caoutchouc like substance obtained by the polymerization of erythrene are dissolved in 100 parts of benzene. A solution of one part of sulfur inono-chlorid ($471 in parts of carbon disulfid CS is added and the mixture is allowed to stand for 1.5 to 2 minutes, and is then poured into alcohol. On stirring a. substance separates which is distinguished from the parent material by being of greater toughness and of better resistance to different agents. It is grayish in color and not adhesive;

Example 2 50 parts of the caoutcho'uc like substance obtained by polymerization of .erythrene are intimately mixed by means of mixing rolls with 15 parts of powdered sulfur. The product shaped from the resulting sheet is then heated in asuitable apparatus for from 5 to 6 hours at 150-160 C.

- Example 3: 100 parts of the product of polymerization obtained from erytlirene are carefully worked together with 10 parts of Htlblll'llttl sulfur in a mixing apparatus prodded with rolls until a perfectly homogeneous mass results. The resulting product brought into the desired shape and is then subjected in an iron vulcanizing vessel to the action of steam under a pressure of 3 -4: atmospheres. After from 34L hours the process complete.

Instead of the product of polymerization used in the examples a mixture of the caoutchouc like product obtained from erytlircnc with natural caoutchouc can be used; similarly other methods of vulcanization can be employed. I

The novel caoutchouc substance of the present invention forms an ozonid, which upon decomposition with water yields succinic aldehyde. Vulcanized mixtures of erythrene eaoutchouc and natural caoutchouc.

form ozonids which upon decomposition with water give succinic aldehyde and levulinic aldehyde.

We claim c 1. As a new product a vulcanized caoutchouc-like substance comprising. vulcanized erythrene cao-utchouc, being a grayish nonadhcsive substance containing sulfur and forming an ozonid which upon decomposition with 'ater yields succinic aldehyde.-

2. As a new product a vulcanized caoutchouc-like substance comprising a vulcanized mixture of erythrenc caoutcliouc and natural caoutchoue, being a grayish non-adhesive substance containing sulfur and forming ozcnids which upon decomposition with water yield succinic aldehyde and levulinic aldehyde.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

FRITZ HOFMANN. CARL COUTELLE.

[L. [L. s.]

It is hereby certified that in Letters Patent N0.'1,i084,334, granted J annary 13,

1914, upon theapplication of Fritz Hofmann and Carl Coutelle, of Elberfeld, Germany, for an improvement in Vulcanized Caoutchouc-Like Substances, an error appears in the printed specification requiring correction as follows: Line 2'4, strike out the words equal to and some even better than and insert the words less amid one predict whether the; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this21st day of April, A. D., 1914.

[SEAL] J. T. NEWTON,

Acting Commissioner of Patents. 

